Krull

“Krull” (a city-state, actually), started in 1979 – well before the 1983 movie of the same name.

Krull scenarios and game aids may be purchased in PDF format at...
http://www.drivethrurpg.com/browse.php?manufacturers_id=6717
 

 
The lands above are the extent of “Krull” circa 1979-80.
(map drawn over time)
 

Underport: Abyssal Descent, a vintage mega-dungeon.

Compatable with Knights of the All Mind and other OSR/d20 rule sets. Originally written incrementally during RPG's early years between mid-1978 and late 1981, the style is swords & sorcery focused on heavy fighting action. Now more than 250 individual, detailed encounters on 9+ dungeon levels plus a small pirate village and 2 underground keeps.